Coupling for toner cartridge



FIG. 1 is a front perspective view of a coupling for toner cartridge, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a left side elevational view thereof.

The broken lines depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a coupling for toner cartridge, as shown and described. 